Two‐Photon Pumped Single‐Mode Lasing in CsPbBr3 Perovskite Microwire
Achieving high‐quality, frequency‐upconversion single‐mode lasing output is an important requirement for developing new nonlinear optoelectronic devices, such as on‐chip optical communication, nonlinear optical switches, and optical parametric amplifiers. Here, an individual CsPbBr3 microwire prepar...
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Veröffentlicht in: | Advanced functional materials 2024-02, Vol.34 (6), p.n/a |
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Sprache: | eng |
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Zusammenfassung: | Achieving high‐quality, frequency‐upconversion single‐mode lasing output is an important requirement for developing new nonlinear optoelectronic devices, such as on‐chip optical communication, nonlinear optical switches, and optical parametric amplifiers. Here, an individual CsPbBr3 microwire prepared by the anti‐solvent method is served as both gain media and microresonator to achieve two‐photon pumped frequency upconversion single‐mode lasing with the side‐mode suppression ratio of 18 dB. Meanwhile, the refractive index of orthorhombic perovskite is theoretically calculated based on first principles, and determining its square whispering‐gallery oscillation type by combining with the plane wave model and the steady‐state oscillation conditions of laser. The extracted exciton binding energy of 33.15 meV higher than the thermal ionization energy of room temperature (≈26 meV) suggests that the as‐grown CsPbBr3 microwires possess the capacity to achieve two‐photon pumped lasing output, as well further gaining deeper insights into the role of exciton‐phonon coupling in light emission.
The high‐quality (≈3200), frequency up‐conversion single‐mode lasing (≈18 dB) using an individual CsPbBr3 microwire is achieved, which can serve as both gain medium and optical microresonator. Also, the oscillation type of light waves confined in the cross‐sectional square structure and the role of exciton‐phonon coupling in light emission are clarified distinctly. |
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ISSN: | 1616-301X 1616-3028 |
DOI: | 10.1002/adfm.202308957 |